Interfaces

Systems

Various

Icom R8500

To equip the Icom R8500 with a discriminator output, your soldering iron can remain cold.
By repositioning a jumper, the unfiltered baseband audio becomes available from the AGC connector at the back of the
receiver.

Icom R8500

Jumper position

By removing the receiver's upper lid, the jumper becomes visible. In an unmodified receiver, this jumper connects the
moddle and right pin of the jumper block. If you reposition the jumper to the left, the AGC cinch connector is connected to the
receiver's discriminator ('AF direct detector output').

By the way, this 'operation' is also described on page 16 of the receiver's user manual.